console.log('hello geekbang');

exports.hello = ' world';

exports.add = (a, d) => {
    return a + b
}

exports.geekbang = { hello: ' linbao' };

// 意为2秒之后在验证第一个函数参数的验证逻辑
setTimeout(() => {
     console.log(exports);
}, 2000);

module.exports = function minus(a, b) {
    return a - b;
}